Report graph: per day line chart for a species

We have another example of a chart generated by a user that we'd like to adopt:

<img width="1350" height="320" alt="Image" src="https://github.com/user-attachments/assets/cd250da2-fcf5-4985-8895-08290f7c9902" />

It's a per day (bucket) line graph, for a single tag at a single site. Count of occurrences on the y-axis, and the x-axis is buckets along a timeline, spanning years?